Phytomyza autumnalis

    Description

    The larvae of the fly Phytomyza autumnalis mine the leaves of various thistles in the family Cirsium and also some knapweeds (Centaurea family) creating a full depth, greenish, usually linear, mine which is usually upper surface and doubles back on itself. The pupa is metallic black and the anterior spiracles protrude through the lower epidermis. The mines of Phytomyza spinaciae are identical to those of Phytomyza autumnalis and can only be separated by larval and puparium features. The puparium of Phytomyza spinaciae is white whereas Phytomyza autumnalis is black.

    Identification difficulty

    Adult Leafmine

    Recording advice

    Adult: Unless identified by a recognised expert, a photo is required and the specimen should be examined with a microscope. In the comments box, state the key or ID method used and describe the size and identifying characters.

    Leafmine: Unless identified by a recognised expert, a photo is required. If the photo doesn't show the key ID features then in the comments box describe the size and identifying characters you have observed. In this case the larva or pupa must be photographed.

    Habitat

    Wherever the larval foodplants occur.

    When to see it

    Mine: October and November

    UK Status

    Status in Britain is difficult to determine due to lack of records.

    VC55 Status

    Status in Leicestershire and Rutland not known.

    Leicestershire & Rutland Map

    MAP KEY:

    Yellow squares = NBN records (all known data)
    Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

    UK Map